package thread;

import java.util.*;

public class SyncApiDemo2 {
    public static void main(String[] args) {
//        List<Integer> c=new ArrayList<>();
//         List<Integer>c=new LinkedList<>();
//        Set<Integer> c=new HashSet<>();
        List<Integer> c=Collections.synchronizedList(new ArrayList<>());
        Thread t1=new Thread(){
            public void run() {
                for (int i = 0; i < 1000; i++)
                    c.add(i);//在一个方法的局部内部类里,要求
            }
        };
        Thread t2=new Thread(){
            public void run(){
                for (int i =1000; i < 2000; i++)
                    c.add(i);
            }
        };
        t1.start();
        t2.start();
        try {
            Thread.sleep(50);
        } catch (InterruptedException e) {
        }
        System.out.println(c.size());

    }
}
